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Discrepancy of neural response between exogenous and endogenous task switching : an event-related potentials study

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Title: Discrepancy of neural response between exogenous and endogenous task switching : an event-related potentials study
Authors: Miyajima, Maki Browse this author
Toyomaki, Atsuhito Browse this author →KAKEN DB
Hashimoto, Naoki Browse this author
Kusumi, Ichiro Browse this author →KAKEN DB
Murohashi, Harumitsu Browse this author →KAKEN DB
Koyama, Tsukasa Browse this author →KAKEN DB
Keywords: cognitive control
endogenous rule shifting
event-related potentials (ERPs)
executive function
exogenous rule shifting
task switching
Issue Date: 1-Aug-2012
Publisher: Lippincott Williams & Wilkins
Journal Title: Neuroreport
Volume: 23
Issue: 11
Start Page: 642
End Page: 646
Publisher DOI: 10.1097/WNR.0b013e328354b066
PMID: 22713928
Abstract: Task switching is a well-known cognitive paradigm to explore task-set reconfiguration processes such as rule shifting. In particular, endogenous task switching is thought to differ qualitatively from stimulus-triggered exogenous task switching. However, no previous study has examined the neural substrate of endogenous task switching. The purpose of the present study is to explore the differences between event-related potential responses to exogenous and endogenous rule switching at cue stimulus. We modified two patterns of cued switching tasks: exogenous (bottom-up) rule switching and endogenous (top-down) rule switching. In each task cue stimulus was configured in order to induce switching or maintaining rule. In exogenous switching tasks, late positive deflection was larger in the switch rule condition than in the maintain rule condition. However, in endogenous switching tasks late positive deflection was unexpectedly larger in the maintain rule condition than in the switch-rule condition. These results indicate that exogenous rule switching is explicit stimulus-driven processes whereas endogenous rule switching is implicitly parallel processes independent of external stimulus.
Rights: This is a non-final version of an article published in final form in Neuroreport, 23(11), 642-646, 1 Aug. 2012
Type: article (author version)
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 豊巻 敦人

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